We propose a spin-orbit qubit in a nanowire quantum dot on the surface of a multiferroic insulator with a cycloidal spiral magnetic order. The spiral exchange field from the multiferroic insulator causes an inhomogeneous Zeeman-like interaction on the electron spin in the quantum dot, producing a spin-orbit qubit. The absence of an external magnetic field benefits the integration of such a spin...

A method for family of G Pythagorean hodograph (PH) quintic spiral transition from straight line to circle is discussed in this paper. This method is then extended to a pair of spirals between two straight lines or two circles. We derive a family of quintic transition spiral curves joining them. Due to flexibility and wide range of shape control parameters, our method can be easily applied for ...

We report a trigonometric parallax measurement of 22 GHz water masers in the massive star-forming region G034.43+0.24 as part Bar and Spiral Structure Legacy (BeSSeL) Survey using Very Long Baseline Array. The is 0.330$\pm$50.018 mas, corresponding to distance $3.03^{+0.17}_{-0.16}$ kpc. This locates near inner edge Sagittarius spiral arm at one end linear distribution young stars which cross n...

Intermediate-scale spurs are common in spiral galaxies, but perhaps most distinctively evident in a recent image showing a quasi-regular series of dust lanes projecting from the arms of M51 (Scoville & Rector 2001). We investigate, using time-dependent numerical MHD simulations, how such spurs could form (and subsequently fragment) from the interaction of a gaseous interstellar medium with a st...

A method for family of G planar cubic Bézier spiral transition from straight line to circle is discussed in this paper. This method is then extended to a pair of spirals between two straight lines or two circles. We derive a family of cubic transition spiral curves joining them. Due to flexibility and wide range of shape control parameters, our method can be easily applied for practical applica...

Spatially extended versions of the cyclic-dominance Rock–Paper–Scissors model have traveling wave (in one dimension) and spiral (in two dimensions) behavior. The far field of the spirals behave like traveling waves, which themselves have profiles reminiscent of heteroclinic cycles. We compute numerically a nonlinear dispersion relation between the wavelength and wavespeed of the traveling waves...

We report the existence of a single plane in the space of global photometric parameters describing elliptical galaxies and the bulges of early type spiral galaxies. The three parameters which define the plane are obtained by fitting the Sersic form to the brightness distribution obtained from near-infrared K band images. We find, from the range covered by their shape parameters, that the ellipt...

In [6] it was shown that if f ∈ is starlike of order α, α= 0.294, . . . , so is the Libera integral operator F . We also know that (see, e.g., [1]) there are functions which are univalent or spiral-like in so that their Libera integral operators are not univalent or spiral-like in . Li and Owa [5] proved that if f ∈ is univalent in , then Fn(z) is starlike in |z| < 3/8. The number 3/8 is sharp....

A fundamental feature of development in the spore-forming bacterium Bacillus subtilis is the switch from medial to asymmetric division. The switch is brought about by a change in the location of the cytokinetic Z ring, which is composed of the tubulin-like protein FtsZ, from the cell middle to the poles during sporulation. We report that the medial Z ring is replaced by a spiral-like filament o...

Most optimization problems in engineering are nonlinear, with many constraints. Consequently, finding optimal solutions to such nonlinear requires efficient methods. of the methods used so far gradient-based In methods, objective function must be differentiable, and search for optimum solution usually starts a guess-point. For multimodal objectives, will likely get stuck at local optimum. Nowad...